Which of the following numbers will replace the question mark (?) in the given series?
1778, 1609, 1465, 1344, 1244,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4. i.e. 1163.
The series follows this pattern:
1778 - 1609 = 169 = 132
1609 - 1465 = 144 = 122
1465 - 1344 = 121 = 112
1344 - 1244 = 100 = 102
1244 - a = 81 = 92 ⇒ a = 1163